Electrical drier for paper and the like



W. 0. BALDWIN.

ELECTRICAL DRIER FOR PAPER AND THE LIKE.

APPLICATION FILED W520, 1919.

1,401,303, Ldtented Dec. 27, 1921.

I I IVUE/V TUE fiTTY'ET a simp in the Province of Ontario,

- electrical driers for WILLIAM CEARIJES BALDWIN, OF OTTAWA, ONTARIO, CANADA.

Specification of Letters Patent.

nnnc'rmcn. muna son PAPER AND THE LIKE Patented Dec. 27, 1921.

Application filed January 20, 1919. Serial No. 272,150.

' To all whom it concern:

. Be it known that I, WILLIAM CHARLES BALDWIN, a subject of the King of Great Britain, and resident of the citjy; of Ottawa, I ominion of Canada, have inventedcertain new and useful Improvements in Electrical Driers for Paper and the like, of which the following is a specification. p

This invention relates to improvements in paper and the like, and the ob'ects of the invention areto provide le and eifective device occupying small space, and by which paper-or other material may be rapidly and continuously dried. It consists essentially'of a moving electrically heated screen conveyer constructedand ar ranged as shown in detail in the accompany- 1n specification and drawings.

alternative form of the n the drawings: I I

Fi re 1 is a sectional perspective view showlng an embodiment of the invention.

Fig. 2 is a vertical sectional view of an invention.

In the drawings like characters of reference'indicate corresponding parts in all the figures. r 4

Referring to the drawings,

A represents an electrical movable element, preferably in the form of an endless .conveyer or belt formed from wire mesh of brass or other suitable material and mounted between suitable rollers 10 and 11, the rollers being supported from suitable bearings 12 and 13, the'bearings on one side only of the rollers being shown on the drawings. The bearin s 12 and 13 are supported from a suitab e frame work-14 of wood or like insulating material whereby the bearings at opposite ends will not be in electrical contact. The

1 sheet of paper B to be dried is carried by the bearing .12, and the other terminal on the, bearing 13, the current the conveyer A which is electrically heated to a proper temperature. I prefer to heat I the conveyer A by the use of a comparatively low, potential, providing one termlnal 15 on passin through the wire mesh of the conveyer, an thereby.heat ing the same. I prefer to a current under 100 volts, direct or alternating asmay be desired, the amount of current used being in proportion to the resistance of. the conveyer and. suflicient to attain the elevated temperature desired. p v

The conveyer A takes the place of the drier felt and series of drying rolls usually employed in drying paper, and it will be found possible by its use to rapidly and efliciently dry a moving strip or sheet of paper.

It will be understood that the motion will be imparted to the conveyer A in any suitable way by any suitable driving mechanism connected to either or both of the rollers 10 and 11.

In the alternative form of the invention shown in Fig. 2 a series of pairs of rollers C'and 0 D and D E and E are em loyed, each provided with a conveyer G 2 and E similar to the conveyer A, being all supported from the frame F. The strip of paper in this case may be fed, for instance, from right to left along the upper conve er 0, then between the conveyers C and then between the conveyers D and E and then along the bottom of the conveyer E in this wa both sides of .each conveyer will d in imparting heat to the sheet'of I the device a casing G may be provided inclosing the various heating conveyers.

It will be observed that in the formof the invention shown in Fig. 2 a conveying belt applies the heat to both sides of the aper, thereby effecting an extremely rapid rying .of the same. Y

As many changes could be made in the above construction and many apparently widely different embodiments of my invention within the scope of the claim, constructed without departin from the spirit or scope thereof, it is inten ed that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim as myinvention is.

In a drier, an endless belt formed of electric conductive material, means for passing an electric current through the belt to heat the same.

In witness whereof'I have hereunto set my hand in the presence of a witness.

Witness:

Russia; S. Sum. 

